bk mikro model 7 & 7rl - techna-tool inc.oi: bk mikro 7 bk mikro 7 manual rev. 2.00 dated...

BK MIKRO MODEL 7 & 7RL

Monitoring System for Tool, Object and Free Space Monitoring

Technical Documentation – North American Edition Released: October 2003

553 Industrial Dr. Hartland, WI 53029 262-367-8665 fax 262-367-0208 web-site www.techna-tool.com email [email protected]

OI: BK MIKRO 7 Contents

Rev. 2.00 dated 20.01.2006 Page 1

Contents

1 Basic Information................................ ................................ ................................ ................4 1.1 Warranty and Liability................................ ................................ ................................ ............4 1.2 Intended Use.........................................................................................................................4 1.3 Copyright..............................................................................................................................4 1.4 Hazards ................................ ................................ ................................ ................................5 1.4.1 Electrical Hazards .................................................................................................................6 1.4.2 Mechanical Hazards ..............................................................................................................6 1.4.3 Thermal Hazards ...................................................................................................................6 1.5 Compliance with Safety Notes and Regulations................................ ................................ ........7 1.6 Commitment.........................................................................................................................7 1.7 Qualification..........................................................................................................................7 1.8 Transportation, Storage, Disposal ...........................................................................................8 1.9 Suitable Fire Extinguishing Agents..........................................................................................8 1.10 Check List for Correct Handling...............................................................................................9

2 Characteristics................................ ................................ ................................ ..................10 3 System Components .........................................................................................................11 3.1 Control unit .........................................................................................................................11 3.1.1 Characteristic properties ................................ ................................ ................................ ......11 3.1.2 Technical data.....................................................................................................................12 3.1.3 Connections........................................................................................................................13

Power supply ................................ ................................ ................................ ......................13 Control inputs................................ ................................ ................................ ......................13 Selection inputs ................................ ................................ ................................ ..................14 Relay outputs................................ ................................ ................................ ......................15

3.1.4 Light-emitting diodes............................................................................................................15 3.1.5 Rotary switches ................................ ................................ ................................ ..................16 3.1.6 Toggle switches ................................ ................................ ................................ ..................17

"Scanning intensity" switch................................ ................................ ................................ ..17 "Normally open contact / Normally clos ed contact" switch................................ ......................17 "Object monitoring / Free space monitoring" switch ................................................................17 "Clockwise / Counter-clockwise" switch (CW/CCW)...............................................................18 "Tolerance range" switch................................ ................................ ................................ ......18 "Scanner" switch.................................................................................................................18

3.1.7 Notes on technical safety .....................................................................................................19 3.2 Scanner................................ ................................ ................................ ..............................20 3.2.1 Characteristic properties ................................ ................................ ................................ ......20

BK7SC – Scanner with mechanical backstop.........................................................................20 BK7RLSC – Scanner without mechanical backstop ................................................................20

3.2.2 Technical data.....................................................................................................................21 3.2.3 How to change ....................................................................................................................22 3.3 Connection cable.................................................................................................................22

4 Mode of Operation ............................................................................................................23 4.1 Scanning process................................................................................................................23

"Start" cycle with CW travel................................ ................................ ................................ ..23 4.2 Output of results................................ ................................ ................................ ..................24 4.3 Return travel monitoring........................................................................................................24 5 BK MIKRO 7 with scanner BK7SC – Scanning in one direction .........................................25 5.1 Teach mode = monitoring with learning function................................ ................................ ......26 5.1.1 "Teach-in", the learning cycle ...............................................................................................26

Contents OI: BK MIKRO 7

Page 2 Rev. 2.00 dated 20.01.2006

Learning cycle with CCW travel ............................................................................................ 26 5.1.2 "Start", the real scanning process................................ ................................ ......................... 26 5.2 Switch mode = monitoring with setting scanning range ........................................................... 27 5.2.1 Control operation "Object monitoring" .................................................................................... 27 5.2.2 Control operation "Free space monitoring" ................................ ................................ ............. 27 5.2.3 Deflection of wand ............................................................................................................... 28 5.2.4 Examples for range settings................................ ................................ ................................ . 28

6 BK MIKRO 7 with scanner BK7RLSC – Scanning in both directions.................................. 29 6.1 Teach mode = monitoring with learning function ................................ ................................ ..... 30 6.1.1 "Teach-in", the learning cycle ............................................................................................... 30

Learning cycle with CW -CCW travel...................................................................................... 30 6.1.2 "Start", the real scanning process................................ ................................ ......................... 31

"Start" cycle with CW-CCW travel using teach mode.............................................................. 31 6.2 Switch mode = monitoring with setting scanning ranges ................................ ......................... 32 6.2.1 Reference procedure............................................................................................................ 32 6.2.2 Control operation "Object monitoring" .................................................................................... 33

"Start" cycle with CW-CCW travel using switch mode................................ ............................. 33 6.3 Scanning in one direction with scanner BK7RLSC.................................................................. 33 7 Cycle Times...................................................................................................................... 34

8 Status Indication ............................................................................................................... 35 8.1 Yellow LED................................ ................................ ................................ ......................... 35 8.2 Red LED / Green LED................................ ................................ ................................ ......... 35 8.3 Error messages – Flashing red and green LED ...................................................................... 36 8.4 Installation Notes ................................................................................................................ 37 8.5 Control voltage connection ................................................................................................... 37 8.6 Mounting bracket ................................................................................................................ 38 8.7 Interference prevention................................ ................................ ................................ ......... 38 9 Ordering Information ........................................................................................................ 39

OI: BK MIKRO 7 Table of Figures

Rev. 2.00 dated 20.01.2006 Page 3

Table of Figures

Fig. 3-1: Control unit – Connections .....................................................................................................11 Fig. 3-2: Control unit – Dimensions ................................ ................................ ................................ ......12 Fig. 3-3: Control unit – Light-emitting diodes .........................................................................................15 Fig. 3-4: Control unit – Rotary switches ...............................................................................................16 Fig. 3-5: Control unit – Toggle switches ...............................................................................................17 Fig. 3-6: Definition of the rotation direction............................................................................................18 Fig. 3-7: Range of tolerance................................................................................................................18 Fig. 3-8: Scanner...............................................................................................................................21 Fig. 3-9: Connection cable – Pin configuration................................ ................................ ......................22 Fig. 4-1: "Start" cycle for scanning in one direction...............................................................................23 Fig. 5-1: Handling BK MIKRO 7 with scanner BK7SC............................................................................25 Fig. 5-2: "Teach-in" for scanning in one direction...................................................................................26 Fig. 5-3: Range settings using rotary switches for scanning in one direction............................................28 Fig. 6-1: Handling BK MIKRO 7 with scanner BK7RLSC........................................................................29 Fig. 6-2: "Teach-in" for scanning in both directions ................................................................................30 Fig. 6-3: "Start" cycle for scanning in both directions ............................................................................31 Fig. 6-4: Range setting using rotary switches for scanning in both directions...........................................33 Fig. 8-1: Control voltage connection .....................................................................................................37 Fig. 8-2: Mounting bracket ................................ ................................ ................................ ..................38

© Copyright MSC Tuttlingen GmbH, 78532 Tuttlingen, 2003

These operating instructions are available as item no. 68 36 231.

The publishers reserve the right to change the technical contents of this documentation without prior notice.

BK Mikro 7 Manual OI: BK MIKRO 7

Page 4 Rev. 2.00 dated 20.01.2006

1 Basic Information

1.1 Warranty and Liability

Our “Terms and Conditions of Sale" shall apply as standard. All warranty and liability claims in the event of personal injury and/or damage to property shall be excluded if they can be traced to one or several of the following causes:

• Use outside the intended scope of the equipment design.

• Incorrect installation, commissioning, repair, and maintenance of the equipment. • Operation of the equipment with defective safety facilities or incorrectly fitted or non-functional

safety and protective facilities.

• Non-compliance with the notes in these operating instructions concerning transportation, storage, fitting, commissioning, operation, limit values, and maintenance.

• Unauthorized changes.

• Insufficient monitoring of parts subject to wear. • Cases of catastrophe due to action by foreign bodies and acts of God.

In the case of software, warranty is further excluded in respect of:

• defects which are unavoidable considering the state of the art existing at the time of delivery or performance and the intended use and price of the equipment, with the exception of such faults whose acceptance would be unreasonable for the customer,

• software copies not supplied by us,

• software changed by the customer, even if the defect occurs in a part which has not been changed, unless it can be proven that the occurrence of the defect is completely unrelated to the change.

1.2 Intended Use

BK MIKRO 7 is a control system to be used for tool, object and free space monitoring applications.

We will not accept any liability whatsoever for any and all damage caused by a different or additional use of this equipment.

Use within the intended scope of the design also includes: • compliance with all instructions and notes contained in these operating instructions, and

• observance of all inspection, service, and maintenance intervals.

1.3 Copyright

These operating instructions are intended for the operator and the operator’s personnel only. They contain instructions and notes which may not be disclosed to third parties, either in full or in part, by

• reproduction,

• circulation, or

• any other means. Non-compliance may lead to prosecution under criminal law.

OI: BK MIKRO 7 BK Mikro 7 Manual

Rev. 2.00 dated 20.01.2006 Page 5

Safety

Explanation of Symbols and Notes

Immediate Danger

for life and limb of personnel and others.

Non-compliance will cause death or most serious (crippling) injury.

Hazardous Situation

for life and limb of personnel and others.

Non-compliance may cause death or most serious injury.

Potentially Hazardous Situation

Non-compliance may cause light injury;

also warning against damage to property.

Notes on Correct Handling

Non-compliance may cause damage to the product and/or damage to parts/items in the vicinity.

Environmental Protection

Non-compliance may have an impact on the environment.

1.4 Hazards

The system BK MIKRO has been built to the technical state of the art and all recognized technical rules. Nevertheless, its use may cause hazards for life and limb of the user or third parties, or have a detrimental effect on the equipment or other property.

The system is to be used only

• within its intended design limits

• in a technically safe condition.

Faults which may have a detrimental effect on safety are to be remedied immediately. Until such remedy is effected, the equipment may not be operated.

Danger

Warning

Caution


Page 6 Rev. 2.00 dated 20.01.2006

1.4.1 Electrical Hazards

Any work on the electrical power supply is to be carried out by a specialist electrical engineer only.

Switch off mains supply before opening up your equipment in order to avoid any direct electrical contact.

If work needs to be carried out on live components, a second person is to provide assistance and operate the mains switch in any emergency.

An open casing constitutes a health hazard due to high frequency electrical and magnetic fields. These HF electrical and magnetic fields might be hazardous for anyone with heart problems (heart pacemaker).

1.4.2 Mechanical Hazards

There are injury hazards caused by:

• Cuts caused by component edges

• Stabs by contact with moving wand

• Skin tears from touching the boards on their soldered sides

• Injuries to fingertips from inserting jumpers

Sensitive people may react allergically in the event of: their skin coming into contact with metal parts (soldering tin, metal brackets, screws, wires, etc.).

1.4.3 Thermal Hazards

Avoid any contact with DC/DC transducers, multiplexers, high performance ICs, transistors, voltage controls, etc. during operation and within 30 minutes after switching off the mains supply and external voltages.

Non-compliance with this instruction may cause burns.

Danger

Caution

Warning

Warning


Rev. 2.00 dated 20.01.2006 Page 7

1.5 Compliance with Safety Notes and Regulations

The fundamental requirement for safe handling and trouble free operation is an understanding of the basic safety notes and safety regulations.

These operating instructions contain the most important notes for safe operation of the system BK MIKRO.

The content of these notes – safety notes in particular – is to be complied with by all who work with this machine.

In addition, please observe all national regulations in respect of:

• accident prevention

• setting up electrical and mechanical plant

• radio interference suppression

1.6 Commitment

All personnel tasked with jobs at the BK MIKRO undertake, before starting work,

• to observe the fundamental regulations on health and safety at work as well as on accident prevention,

• to read the chapter on safety as well as all warning notes contained in these operating instructions, and to confirm by their signature, that they have read and understood these.

At regular intervals there will be an inspection regarding this safety-conscious working of personnel.

1.7 Qualification

Trained specialist personnel only may work on the BK MIKRO.

Personnel competences are to be clearly established with regard to mounting, commissioning/start-up, operation, servicing, and maintenance.

Trained specialist personnel only may carry out the following activities:

• installation

• commissioning

• operation

• maintenance

Trainee personnel may work on the machine only when supervised by an experienced person.


Page 8 Rev. 2.00 dated 20.01.2006

1.8 Transportation, Storage, Disposal

Transportation

During transportation damage may occur.

Ensure transportation in original packaging only.

Storage

Incorrect storage might cause defects to occur.

Please note the details provided in "Technical Data".

Disposal

Electronic scrap has a negative impact on the environment.

To avoid any such impact on the environment, this equipment should only be disposed of via the proper channels for the recycling of electronic material.

Do not dispose of this equipment in the waste bin !

1.9 Suitable Fire Extinguishing Agents

In the event of fire hazardous

vapors and gases may occur.

In the event of fire

• disconnect system from all external connections

• disconnect mains plug For extinguishing purposes, never use the following:

• water

• powder extinguisher (not suitable for electrical equipment)

• halon fire extinguisher (these damage the ozone layer) Only use:

• residue-free carbon dioxide fire extinguishers

Warning


Rev. 2.00 dated 20.01.2006 Page 9

1.10 Check List for Correct Handling

Note:

If you forget to read the instructions provided for a particular step, or if you peruse the instructions too quickly, you may act incorrectly due to ignorance.

How to avoid incorrect action:

• Thoroughly read all instructions

• Carry out the instructions

• Confirm that the instructions have been carried out

This is how you never lose track:

þ Following each step actually carried out, immediately check the relevant box !

¨ Check delivery

¨ Physical environmental and operating conditions

¨ Energy requirement: type, quality, quantity

¨ Protective measures

¨ Installation

¨ Connection of peripheral devices

¨ Software


Page 10 Rev. 2.00 dated 20.01.2006

2 Characteristics

BK MIKRO 7 is a control system suitable for tool as well as for object and free space monitoring applications. The complete BK MIKRO 7 system is comprised of:

• a control unit,

• a sensor (scanner),

• a connection cable.

BK MIKRO 7 is based on existing design concepts for tool, object and free space monitoring and can be used universally for different types of monitoring by the integration of multifarious functions:

• Tool monitoring Monitoring of the scanning position whose precise location has been previously entered by "Teach-in", e.g. to carry out a tool check before each working cycle.

• Object monitoring, free space monitoring Monitoring a scanning range freely selectable via two adjusting switches, e.g. to carry out tool checks for tools with varying diameters (object monitoring), or for ejection checks (free space monitoring).

Two types of scanners are available for various demands. From this two different monitoring systems result.

BK7SC : Scanner with mechanical backstop.

BK7RLSC : Scanner without mechanical backstop.

Principle of operation

The wand of the scanner scans tools, objects or critical process spaces free of potential, in line with machine cycles.

A control unit equipped with a micro-computer triggers the movement of the wand upon an external signal and passes the scanning result on to the machine control via relay contacts.

The galvanically isolated inputs and outputs guarantee a high degree of operational safety and protection against interferences.

Further features

• Scanning in one direction or in both directions

• Scanning in clockwise (CW) or counter-clockwise (CCW) direction

• Two steps for scanning intensity

• Output relay contacts selectable as normally open or normally closed

• Two ranges of tolerance for "O.K." message

• Indication of the scanning result by two LEDs "O.K." and "K.O." on the control unit

• Detection of cable breaks


Rev. 2.00 dated 20.01.2006 Page 11

3 System Components

3.1 Control unit

3.1.1 Characteristic properties

The control unit is available in three models preconfigured for different supply voltages. The relevant version will be marked on the rating plate: 24 VDC, 120 VAC, 230 VAC.

On its front panel, the control unit is fitted with plug-in screw terminals to connect all machine inputs and outputs, supply voltage, and the scanner.

• The screw terminals have been arranged on two plug-in terminal blocks. These blocks are keyed so that they cannot be accidentally plugged into the wrong socket.

• When in operation, plastic caps cover the screws in the front. Wires to be connected are routed from the top or bottom of the unit.

The scanner will be connected via a 6-wire cable to the scanner socket of the control unit.

Fig. 3-1: Control unit – Connections

Note:

These plugs may only be inserted or removed when the power supply has been disconnected.

Scanner socket

Control inputs

Power supply andControl voltage

24 VDC

Selection inputs(scanning direction)

These terminals must not be connected!

"o.k."relay

"k.o."relay

Powersupply

230 VACor

120 VAC

Scanning wand 250 mm(24 VDC);option standard: open

k.o. o.k.

Scanner

Com

24 V DC

0P1 P2

90

Start Teach S1 S2 S3

AC INL1 N

O

R

270

180

0

90

180

BK MIKRO 7

F

L

Caution


Page 12 Rev. 2.00 dated 20.01.2006

3.1.2 Technical data

Housing Insulating material housing, protection class II, built-in unit Protection type IP 20 Dimensions (W x H x D) 45 mm x 75 mm x 107.5 mm Case mountings Sectional rail, 35 mm, to DIN EN 50022 Power supply voltage (depending on model)

24 VDC ±20% PELV1) Imax = 0.25 A 120 VAC Imax = 0.05 A 230 VAC Imax = 0.025 A

Power consumption 6 VA max. Control voltage (int./ext.) 24 VDC ±20% PELV 1) Inputs Galvanically isolated – Input current 5 mA approx. – Pulse duration 6 ms min. Switched outputs 2 x 250 VAC / 30 VDC, 2 A max. Making/breaking capacity 500 VA / 60 W (max.)

10 mA min. at 10 V Operational life of relay 5 x 107 switching cycles Connections Plug-in screw terminals for connecting

– power supply – control inputs – selection inputs – relay outputs Scanner socket to DIN 45322, 6 pin

Climatological conditions Classification 3K3 under EN 50178 Ambient temperature 0 ºC to +50 ºC Storage temperature –25 ºC to +80 ºC

Fig. 3-2: Control unit – Dimensions Note:

The control unit of BK MIKRO 7 is a built-in unit ! 1) PELV = Protected Extra Low Voltage

The voltage applied must meet the requirements for an extra low function potential with safe disconnection (PELV).

107.

511

0

75

78

45

General tolerancesISO 2768 – mK

Warning


Rev. 2.00 dated 20.01.2006 Page 13

3.1.3 Connections

Power supply

"24 VDC" model :

• "+" 24 VDC terminal

Supply voltage input 24 VDC

• "–" 24 VDC terminal

Reference potential of 24 VDC supply voltage

"120 VAC" and "230 VAC" models 2):

• "L1" terminal

Supply voltage input, depending on model: 120 VAC or 230 VAC

• "N" terminal Supply voltage input, depending on model: 120 VAC or 230 VAC

• "+" 24 VDC terminal

Control voltage for "Start" and "Teach" controlling inputs 24 VDC unregulated, output current 0.1 A max. If an external control voltage is applied, this terminal is not connected.

• "–" 24 VDC terminal

When using the internal control voltage, this terminal must be connected to the "Com" control inputs terminal. If an external control voltage is applied, this terminal is not connected.

Note: 2) Alternatively, "120 VAC" and "230 VAC" models may also be supplied with 24

VDC. In this case, "L1" and "N" terminals must not be connected.

"+24 VDC" and "–24 VDC" terminals are to be connected as described above for "24 VDC" model.

Control inputs

• "Com" terminal

Reference potential for control inputs and selection inputs

• "Start" terminal

An input level of +24 VDC relative to "Com" terminal will trigger a "Start" cycle (the real scanning process).

• "Teach" terminal An input level of +24 VDC relative to "Com" terminal will trigger a learning cycle (the "Teach-in").


Page 14 Rev. 2.00 dated 20.01.2006

Selection inputs

• "S1" terminal

"S2" terminal

"S3" terminal

The input signal (static) of +24 VDC relative to "Com" terminal must be stable during 10 ms min. before "Teach" or "Start".

The input S3 must be connected at a wand length of 250 mm. Concerning shorter wands, S3 remains unconnected. By connecting S3, the wand is slower and therefore it oscillates less.

S1/S2 selection inputs determine scanning direction ! The direction of scanning depends on connected scanner with corresponding switch position.

The meaning of "Clockwise/Counter-clockwise" toggle switch position on control unit may be changed by corresponding S1/S2 input signals.

S1 and S2 may be open. Then is: S1=0, S2=0.

Scanner BK7SC Scanner BK7RLSC

S1 S2 „CW/CCW“ Scanning Scanning

Default setting è 0 0 R CW CW-CCW

0 0 L CCW CCW-CW

1 0 R CW CW 2)

1 0 L CW 1) CW 1) 2)

0 1 R CCW 1) CCW 1) 2)

0 1 L CCW CCW 2)

1 1 R CCW 1) CCW-CW 1)

1 1 L CW 1) CW-CCW 1)

Note:

Default setting: S1 and S2 are not connected. 1) Scanning direction differs from "CW/CCW" switch setting:

S1/S2 inputs change meaning of toggle switch. 2) Stop position must be defined by a “Teach-in” in both directions or by a

reference procedure in both directions. Missing stop position causes an error message, and pulses on control inputs are ignored.


Rev. 2.00 dated 20.01.2006 Page 15

Relay outputs

The terminals have been designed as dry relay contacts. By switch selection, they may be configured as either normally open or normally closed.

The contacts have been designed for 250 VAC and, by additional internal circuits, protected against inductive switch-off peaks of up to 19 W (2 ms).

• "K.O." relay terminals

These two terminals are used to indicate a fault message (K.O.).

• "O.K." relay terminals

These two terminals are used to indicate a no fault message, i.e. a good cycle (O.K.).

Note:

Relay as normally closed contact: active = open

inactive = closed

Relay as normally open contact: active = closed

inactive = open

When there is no power to the unit, the contacts always will be open.

Even when using relay as normally closed, they are open (like the active status) when the power supply is not

connected.

3.1.4 Light-emitting diodes

Three light-emitting diodes (LEDs) on the front panel provide information about the current status of the BK MIKRO 7 monitoring system:

• Power supply / Status Yellow LED to indicate supply voltage and status

• "K.O." relay Red LED to indicate fault message

• "O.K." relay Green LED to indicate no fault message

• Error messages Flashing red and green LED to indicate illegal switch settings and incorrect selection inputs

Fig. 3-3: Control unit – Light-emitting diodes

L1 NAC IN

k.o. o.k.

LEDyellow

LEDred

LEDgreen


Page 16 Rev. 2.00 dated 20.01.2006

3.1.5 Rotary switches

The two rotary switches P1 and P2 on the control unit front panel are used to

• select the scanning mode ("Teach" or "Switch").

• set the angular positions of the ranges, noted in degrees, that are controlled by object monitoring or free space monitoring.

The position settings are possible in steps of 22.5°.

Fig. 3-4: Control unit – Rotary switches The figure shows the setup on delivery.

The meaning of the rotary switches is determined by the selected scanner together with the corresponding "Scanner" switch position.

Toggle switch Rotary switch Meaning

for scanner BK7SC:

P1=0 P2=0

Scanning using teach mode

P1 ≥ 0 P2 > P1 P2 ≤ 270

Scanning after setting scanning range (object monitoring and free space monitoring), at which:

P1=start position (without tolerance) P2=end position (without tolerance)

for scanner BK7RLSC:

P1=0 P2=0

Scanning using teach mode

0<P1<360 0<P2<360

Scanning after setting scanning ranges (only object monitoring, no free space monitoring), at which:

P1=range CW (rotation from stop position)

P2=range CCW (rotation from stop position) Ranges of tolerance selectable: ±3° and ±10°

Illegal switch settings

• P1=0 and P2 ≠ 0 Error

• P1 ≠ 0 and P2=0 Error will cause flashing red and green LED.

Minimum angle = 5°

The minimum distance between the object and the wand must be an angle of this value, so that scanning can start really, otherwise a "K.O." fault message will be indicated.

90

0

180

270 90

0

180

P1 P2


Rev. 2.00 dated 20.01.2006 Page 17

3.1.6 Toggle switches

Using the six toggle switches arranged next to each other on the control unit front panel, the following functions may be set.

Fig. 3-5: Control unit – Toggle switches

Note:

Setup on delivery: All switches are toggled to the right !

When using scanner BK7RLSC: "Scanner" switch to the left !

"Scanning intensity" switch

Speed and force of scanner's wand in its scanning range.

For "Teach-in" and "Start" cycle, in case of a good message, they amount to:

"Scanning intensity" Impact Forces switch position

approx. 200 mN

approx. 500 mN

The values are valid for a wand of 150 mm length, measured on its scanning tip.

Note: If this switch is in the "low" position, the lower impact force of the scanner will protect the wand from wear and tear.

"Normally open contact / Normally closed contact" switch

Mode of operation for the two output relays (see section "Relay outputs").

"Object monitoring / Free space monitoring" switch

"O.K." result for – finding an object (object monitoring) or – not finding an object (free space monitoring) in the scanning window.

Note: Free space monitoring is admissible only in combination with range setting by rotary switches P1 and P2 and connected scanner BK7SC with toggle switch set to "BK7SC".

Caution

O

R

F

L

High scanning intensity

Relay N.C.(as normally closed contact)

Free space monitoring

Counter-clockwise travel

Large range of tolerance

Scanner TK7RL

Low scanning intensity

Relay N.O.(as normally open contact)

Object monitoring

Clockwise travel

Low range of tolerance

Scanner TK7A


Page 18 Rev. 2.00 dated 20.01.2006

"Clockwise / Counter-clockwise" switch (CW/CCW)

Direction of rotation, i.e. direction to which scanner moves starting from stop position.

Clockwise = When rotating to the right

Scanner viewed from behind (the connection side), looking up length of scanner.

Fig. 3-6: Definition of the rotation direction

Note: Switch position may be changed by selection inputs S1, S2 and S3 (see table in section "Selection inputs").

"Tolerance range" switch

Range of tolerance for "O.K." message referred to the desired position, i.e. position learned by "Teach-in" or set by switches:

small ±3°

great ±10°

Fig. 3-7: Range of tolerance Note: No range of tolerance exists for scanning in one direction using switch mode.

"Scanner" switch

Selection of the scanner.

BK7SC Scanner BK7SC, i.e. use scanner with mechanical backstop!

BK7RLSC Scanner BK7RLSC, i.e. use scanner without mechanical backstop!

Stop positionScanning wand

Scanner

Object

Desired position

great

small


Rev. 2.00 dated 20.01.2006 Page 19

3.1.7 Notes on technical safety

according to DIN VDE 160

according to EMC directive 89/336/EEC

for the models with power supply 24 VDC and 120 VAC

The control unit comprises the following circuits, all isolated from each other:

K.O. output (2 terminals) safely isolated from all other circuits

O.K. output (2 terminals) safely isolated from all other circuits

AC power supply (L1, N) safely isolated from all other circuits

DC power supply (+24 V, –24 V)

safely isolated from K.O. output, O.K. output, and AC power supply

Control inputs (Com, Start, Teach)


Selection inputs (S1, S2, S3)


Scanner connections safely isolated from K.O. output, O.K. output, and AC power supply

Inputs – control inputs (Com, Start, Teach) – selection inputs (S1, S2, S3) – Pulse inputs from scanner

opto-decoupled, no safely isolation from each other


Page 20 Rev. 2.00 dated 20.01.2006

3.2 Scanner

3.2.1 Characteristic properties

The scanner housing is cylindrical and smooth, thus permitting easy installation (e.g. by using the mounting bracket). The scanner is designed for easy access for servicing and changing the wand. Aligning the scanner is easy and requires no additional instruments or aids.

We offer two types of scanners for the different applications.

The sole difference between the two scanners is that the rotary movement of BK7SC's wand is limited by a screw inside the housing, the mechanical backstop.

BK7SC – Scanner with mechanical backstop

Requirement: "Scanner" switch on control unit set to "BK7SC"

Scanner for scanning in one direction: clockwise or counter-clockwise

When a supply voltage is applied, the scanner will always move to its mechanical backstop, the so-called stop position. The scanner will be held in this position by applying a low voltage until a pulse on the "Teach" or "Start" screw triggers a scanning cycle.

BK7RLSC – Scanner without mechanical backstop

Requirement: "Scanner" switch on control unit set to "BK7RLSC"

Scanner for scanning in both directions: CW-CCW or CCW-CW, in special cases for scanning in one direction: CW or CCW

When a supply voltage is applied, the scanner persists in its momentary position. It can be turned to an other position by hand. Only after a pulse on the "Teach" or "Start" screw, it moves into its stop position, that was calculated just now, and will be held there by applying a low voltage.

Using scanners BK7SC and BK7RLSC with a different control unit than BK MIKRO 7 may damage the scanner and control unit.

Note:

• Due to its small diameter, a wand is easily overlooked.

• Your wand is a wearing part! Each contact with a rotating object will cause corresponding wear on the wand. This may even lead to the metal wand breaking.

Due to the injury hazard this causes, users should exercise particular caution within any BK MIKRO rotating area.

Warning


Rev. 2.00 dated 20.01.2006 Page 21

3.2.2 Technical data

Housing Anodized aluminum

Protection type IP 67 Wand length 165 mm (standard), exchangeable wand

Scanning angle – BK7SC – BK7RLSC

270° max. (scanner with mechanical backstop) 360° max. (scanner without mechanical backstop)

Control unit connection Small circular connector, M12x1, 8 pin

Ambient temperature 0 ºC to +80 ºC Storage temperature –25 ºC to +85 ºC

Scanning cycles > 5 million at minimum scanning intensity

Fig. 3-8: Scanner

Note: To prevent injury, your wand will be supplied complete with a protective cap.

BK

BK

BK

BKRO

RO

RO

RO

ø1.

2

59

ø20

26.

5

9.5

42.

5

circ. 150

General tolerances ISO 2768 – mK

Protective cap

Connection cablestraight connector at the scanner end, 8 pinconnector at the control unit end, 6 pin

max

. 98

max

. 114

Connection cableconnector at the control unit end, 6 pin

Connectorangled, 8 pin

Housing

Wand holder

Scanning wandstandard length 165 mm


Page 22 Rev. 2.00 dated 20.01.2006

3.2.3 How to change

After undoing hollow screw (M3), the wand can easily be removed from its holder. Insert new wand into holder and tighten.

3.3 Connection cable

Control unit and scanner are connected by a 8-wire PUR-cable:

• 6 pin small circular connector to DIN 45322 at the control unit end.

• 8 pin molded plug at the scanner end.

• Length 5 m, can be extended to a maximum length of approximately 25 m with extension cables.

Pin configuration (at the control unit end)

Small circular connector to DIN 45322, 6 pin

1 wh white

2 br brown

3 gn green

4 ye yellow

5 gr gray

6 pi pink

Fig. 3-9: Connection cable – Pin configuration

Note:

• To increase the operational life of this cable, it should not be subject to more than a minimum amount of movement during operating cycles.

• If this plug needs to be removed during fitting, please ensure that this pin configuration is followed on reassembly.

gr

ye

gn

br

whpi

3

1

2

65

4


Rev. 2.00 dated 20.01.2006 Page 23

4 Mode of Operation

BK MIKRO 7 can be operated in different ways: • Scanning in one direction

• Scanning in both directions

• Monitoring with learning function (Teach mode)

• Monitoring with setting scanning range (S witch mode) • Monitoring as object monitoring or free space monitoring

All modes allow return travel monitoring.

4.1 Scanning process

Applying a pulse to "Start" or "Teach" terminal will trigger a scanning cycle. During scanning operation, both relay outputs will be inactive (LED "O.K." and "K.O." not illuminated). For the real scanning process, i.e. after a "Start" pulse, initially, the scanner will travel at maximum speed to the start of a given monitoring range. However, its motor will slow down to a preselected scanning speed in time before a learned position using teach mode or a preselected angle set by rotary switch using switch mode is reached.

The monitoring range will then be traversed at the preset scanning speed and its related force which is to be used to scan an object or range.

During the entire operation, all pulses generated by the scanner's internal encoder will be continuously processed.

If the system detects that the scanner no longer moves or has exceeded the end of the monitoring range, the direction of rotation immediately changes, and the scanner will return at maximum speed into its stop position. Depending on the result of scanning the corresponding relay will be activated, and the LED belonging to will indicate the result at the control unit.

"Start" cycle with CW travel

using teach mode using switch mode

Monitoring range = Range of tolerance for "O.K." message

Fig. 4-1: "Start" cycle for scanning in one direction

vmax = max. speed of scanner

vS = speed of scanner preset by "Scanning intensity" toggle switch

Stop Position

"learned" position

Object

Monitoring range

Vmax

Vmax

Wand

Vs

Vmax

Vmax

Vs

Stop position

Wand

Monitoringrange

P1

P2


Page 24 Rev. 2.00 dated 20.01.2006

4.2 Output of results

• Fault message (K.O.)

A fault message will be output immediately on detection. The scanner will return to its stop position.

• Good cycle message (O.K.)

− without return travel monitoring Results will be indicated on reaching the scanner's stop position. Note: Its return travel will not influence scanning results.

– with return travel monitoring On reaching the stop position, scanning process results will be indicated. This ensures that the scanner will have left the monitoring range at the time the results are output and that there are no further waiting periods to be considered.

In the "O.K." state , the "O.K." relay will be active, while the "K.O." relay remains inactive.

In all other cases, "K.O." will be indicated, i.e. the "O.K." relay will be inactive, the "K.O." relay will be active. Note:

"K.O." will not only be indicated when a tool has broken but also when the scanner cannot leave its stop position for any reason (e.g. mechanical "sticking", cable break etc.).

The results of a scanning cycle will remain latched until the following cycle starts.

4.3 Return travel monitoring

BK MIKRO 7 allows monitoring the return travel of the wand.

The signal length on "Start" input determines whether the return travel will be monitored: Before return travel begins, i.e. in the reversing point of the scanner (in the second reversing point for scanning in both directions), the system will re-read the current "Start" signal status.

• Return travel monitoring enabled, if "Start" signal is still present in reversing point.

• Return travel monitoring off, if "Start" signal has already been removed in reversing point.

Return travel monitoring will detect malfunctions!

Example for suitable use of return travel monitoring: BK MIKRO 7 has successfully monitored the object. But the wand is stopped by an obstacle on its return travel, cannot return into its stop position, and will block the transport of the tool.

Result with return travel monitoring "K.O." Machine stops!

Result without return travel monitoring "O.K." Damage of object/machine!


Rev. 2.00 dated 20.01.2006 Page 25

5 BK MIKRO 7 with scanner BK7SC – Scanning in one direction

Note: "Scanner" toggle switch set to "BK7SC" =

Fig. 5-1: Handling BK MIKRO 7 with scanner BK7SC Note:

The selection inputs S1 and S2

• influence the rotation direction of the scanner,

• but do not cause any error messages. Error messages will be indicated by flashing red and green LED.

Switch P1=0

?

yes yes no

yes

no

no

no

yes

yes

no

Teach mode Switch mode

Error

Error

Error

Scanner BK7SC Switch P2=0

?

Switch „Object“

?

Switch P1 < P2

?

Switch P2 ≤ 270

?


Page 26 Rev. 2.00 dated 20.01.2006

5.1 Teach mode = monitoring with learning function

Requirement: Rotary switches P1=0 and P2=0

The scanning range will be determined by a learning cycle (external control signal).

This mode of operation is the typical mode for tool detection applications: The system will check for the presence of the tool at the learned position.

5.1.1 "Teach-in", the learning cycle

The scanner will travel in its preset direction of rotation with its preset speed.

• If a tool is detected, its position will be stored, and the scanner returns to its stop position with maximum speed. In addition, the "O.K." relay will be activated.

• If the scanner rotates to a maximum of 270° without detecting any tool, the "K.O." relay will be activated.

Following "Start" pulses will detect "K.O.".

Learning cycle with CCW travel

The figure shows a learning cycle with setting: Switch "L" and S1=0, S2=0, i.e. CCW travel of the scanner.



Fig. 5-2: "Teach-in" for scanning in one direction

Note: A position learned during "Teach-in" will remain stored, even after removal of power to the unit.

No changes after "Teach-in" and before "Start" mode, concerning: • Tool geometry (layout and dimensions) • S1/S2 selection inputs • "CW/CCW" toggle switch

5.1.2 "Start", the real scanning process

The scanner will travel to the previously "learned" position of the object to check for its presence.

• If the tool is within the monitoring range, the "O.K." relay will be activated.

• If the tool is not detected, i.e. either it is missing or there is an obstacle within the scanner rotating area, the "K.O." relay will be activated.

Stop position

"learned" positionObject

Vs

Vmax

Wand


Rev. 2.00 dated 20.01.2006 Page 27

5.2 Switch mode = monitoring with setting scanning range

Requirement: Rotary switches 0 ≤ P1 < P2 ≤ 270

Rotary switch P1 and P2 settings will define the scanning range. In this mode of operation, BK MIKRO 7 is suitable for monitoring tools with differing diameters (object monitoring) as well as for ejection monitoring (free space monitoring): Two rotary switches are used to define a scanning range which is to be monitored before each working cycle. Note: A Pulse in the "Teach" terminal does not take effect.

5.2.1 Control operation "Object monitoring"

Using "Object monitoring", the control unit will change into an "O.K." state, i.e. it will issue a good message, if during a scanning cycle the operation sequence described below is followed:

• The scanner leaves its stop position.

• The angle preset via rotary switch P1 has been exceeded.

• The angle preset via rotary switch P2 has not been reached.

5.2.2 Control operation "Free space monitoring"

The control operation "Free space monitoring" differs from the object monitoring mode in that within its monitoring range no object must be detected.

Its "O.K." state is characterized by:


• The angle preset via rotary switch P2 has been exceeded.

Caution:

When performing "Free space monitoring", a broken wand will always trigger an "O.K." signal.

Note:

• "Scanning intensity" toggle switch set to "high" will enable scanning operation at a higher speed.

• Life expectancy of the wand will not be reduced, since the unit will rarely contact a part using "Free space monitoring".

Caution


Page 28 Rev. 2.00 dated 20.01.2006

5.2.3 Deflection of wand

Rotation angles will be detected by scanner encoder pulses. These pulses are derived from the rotation of the motor. For scanning, a metal needle (wand) is used which, depending on the scanning force, can be deflected. As the scanner motor is still turning when the end of this wand has already come to a stop, differences between the set and actual rotation ranges will result.

For all speeds, wand deflection is compensated to a range of less than 10°. Deflection will depend, however, on wand length.

5.2.4 Examples for range settings

Fig. 5-3: Range settings using rotary switches for scanning in one direction

Direction of rotation: CCW

No fault range: 90°

No fault range starts: 180°

No fault range ends: 270°

Direction of rotation: CCW




Direction of rotation: CW




Toggle switch

0

90270

180

P1

180

270 90

0

P2

P2

0

90270

180

P1

180

270 90

0

0

90270

180

P1

180

270 90

0

P2

P2

0

90270

180

P1

180

270 90

0

Rotary switches

Direction of rotation: CW




0°

good

P1

P2

o0

P2

good

P1

Rotating range

0o

P1

P2

o0

P2

good

P1

RL

RL

RL

RL

at which:S1=0S2=0

good


Rev. 2.00 dated 20.01.2006 Page 29

6 BK MIKRO 7 with scanner BK7RLSC – Scanning in both directions

Note: "Scanner" toggle switch set to "BK7RLSC" =

Only object monitoring, no free space monitoring !

Special cases make possible scanning in one direction!

Fig. 6-1: Handling BK MIKRO 7 with scanner BK7RLSC

Note:

The stop position of the wand must be determined by scanning in both directions (S1/S2 = 00 or 11), whether with learning function or with reference procedure. After that a scanning in one direction (S1/S2 = 01 or 10) is possible, even a "Teach-in" in one direction for only one object.

Error messages will be indicated by flashing red and green LED.

Switch P1=0

?

yes yes

yes

no no

Scanner BK7RLSC

Switch P2=0

?

yes

Switch „Object“

?

Switch P2=0

?

yes

no no

yes

S1/S2= 00 or 11

?

Determine stop position with "Teach-in" or "Start" (stored positions):

Scanning in both directions !

Error Error

Error

no

no

yes

Stop position exists

?

Teach mode Switch mode

no

yes

S1/S2= 00 or 11

?

Error

Determine stop position with reference procedure:

Scanning in both directions !

Stop position exists

?

Special modus

no specific wiring or relay usually not employed


Page 30 Rev. 2.00 dated 20.01.2006

6.1 Teach mode = monitoring with learning function

Requirement: Rotary switches P1=0 and P2=0

The scanning ranges will be determined by a learning cycle (external control signal).

This mode of operation is the typical mode for tool detection applications: The system will check for the presence of the tools at the learned positions.

6.1.1 "Teach-in", the learning cycle

The scanner will first travel from its initial position with its selected speed in the preset direction.

If a tool is detected, its position will be stored.

Then the wand will travel in opposite direction with its preset speed to determine the position of the second tool, and also store this position.

• Using this two positions the system will calculate the new zero position of the wand as the center between the two tools.

Finally the wand will turn into its zero position, the stop position, and will be held there by applying a low voltage. In addition the "O.K." relay will be activated.

• If the system can detect only one tool or not a single one, the "K.O." relay will be activated.

After such a faulty learning action, the wand will return to its old stop position. Following "Start" pulses will detect "K.O.".

Learning cycle with CW-CCW travel

The figure shows a learning cycle with setting: Switch "R" and S1=0, S2=0, i.e. first CW travel, then CCW travel of the scanner.



Fig. 6-2: "Teach-in" for scanning in both directions

Note:

Positions learned during "Teach-in" will remain stored, even after removal of power to the unit.

No changes after "Teach-in" and before "Start" mode, concerning: • Tool geometry (layout and dimensions)

Changes of S1/S2 selection inputs or "CW/CCW" toggle switch are allowed after "Teach-in".

"CW"

Initial position

"CCW" Object 1

Object 2

Vmax

Vs

Vs

"learned" positions

Stop position


Rev. 2.00 dated 20.01.2006 Page 31

6.1.2 "Start", the real scanning process

The scanner will travel to the previously "learned" positions of the objects to check for their presence. In so doing, the wand will first move in the preset direction, then in opposite direction.

• If the tools are within the monitoring ranges, the "O.K." relay will be activated.

• If one of the two tools is not detected, i.e. either it is missing or there is an obstacle within the scanner rotating area, the "K.O." relay will be activated.

"Start" cycle with CW-CCW travel using teach mode

The figure shows a "Start" cycle with setting: Switch "R" and S1=0, S2=0, i.e. first CW travel, then CCW travel of the scanner.



Fig. 6-3: "Start" cycle for scanning in both directions

Note:

The rotation sequence of "Start" cycle may differ from that of learning cycle.

Scanning in one direction is possible (select corresponding inputs S1, S2), when stop position is detected.

"CW""CCW"

Object 1Object 2

Vmax

"learned" positions

Stop position

Vs

Vs

Vmax

Vmax Monitoring range"CW"

Monitoring range "CCW"


Page 32 Rev. 2.00 dated 20.01.2006

6.2 Switch mode = monitoring with setting scanning ranges

Requirement: Rotary switches 0 < P1 < 360 and 0 < P2 < 360

Rotary switch P1 and P2 settings will define two scanning ranges.

In this mode of operation, BK MIKRO 7 allows only object monitoring : Two rotary switches are used to define two scanning ranges which are to be monitored before each working cycle. Note: A Pulse in the "Teach" terminal does not take effect.

6.2.1 Reference procedure

The first "Start" cycle after supply voltage has been applied, finds out the stop position of the scanner by a so-called reference procedure.

Note: Carry out reference procedure with "Scanning in both directions".

1. After "Start" pulse the scanner rotates to the first object with selected speed in preset direction.

2. From there it moves back in opposite direction for the preset value of the selected direction to the so-called stop position, e.g. P1 means CW rotation.

3. Without stop it travels on at most towards the second value into the reversing point, when a second object is not found before.

4. After that the scanner will return to its stop position.

Result:

"O.K." Both objects detected Movement as described above.

"K.O." No object detected Rotation towards 360°, back to initial position, that becomes stop position.

First object detected, no second object within the preset range

Movement as described above, stop position is determined by the detected first object.

Reference procedure is necessary:

• after interruption of power supply

• after changing the switch settings P1 or P2

• after changing the "Scanner" switch from "BK7SC" back to "BK7RLSC"

Note: Only after a reference procedure the scanner persists in its stop position while power supply is applied.

The S1/S2 selection inputs and the "CW/CCW" toggle switch determine the sequence of rotation directions.

Changes of S1/S2 selection inputs or of toggle switch "CW/CCW" are allowed after reference procedure.


Rev. 2.00 dated 20.01.2006 Page 33

6.2.2 Control operation "Object monitoring"

The second "Start" pulse starts the real scanning process of object monitoring within two ranges.

The control unit will change into an "O.K." state, i.e. it will issue a good message, if during a scanning cycle the operation sequence described below is followed:


• Both objects are detected within the rotation ranges P1 and P2.

"Start" cycle with CW-CCW travel using switch mode

The figure shows a "Start" cycle with setting: Switch "R" and S1=0, S2=0, i.e. first CW travel, then CCW travel of the scanner.



Fig. 6-4: Range setting using rotary switches for scanning in both directions

6.3 Scanning in one direction with scanner BK7RLSC

Requirement:

As soon as the stop position has been detected, i.e. after a "Teach-in" with scanning in both directions or a reference procedure with scanning in both directions, the scanning in one direction is possible with scanner BK7RLSC, too.

For scanning in one direction set the selection inputs S1 and S2 corresponding

to the description in table of section "Selection inputs". Do not change setting of "Scanner" switch.

Teach mode

• Scanning in one direction of already "learned" objects

A "Start" will monitor both of the known objects individually: Scanning in CW direction or in CCW direction.

• Scanning in one direction of "new" objects

Scanning in one direction allows also learning the position of unknown objects.

Stop position remains valid: The wand will return to its stop position, determined by "Teach-in" in both directions, in any case.

Switch mode

• Scanning in one direction of the preset monitoring ranges

A "Start" pulse will monitor both of the monitoring ranges individually: Scanning in CW direction or in CCW direction.

Stop position

P2

Monitoring range "CW"

Monitoring range "CCW"

P1

Vs

Vs

Vmax

Vmax

Minimum angle


Page 34 Rev. 2.00 dated 20.01.2006

7 Cycle Times

Scanning times

The following cycle times hold for systems with scanner BK7SC or BK7RLSC:

"Intensity" BK7SC – Scanning in one direction BK7RLSC – Scanning in both direction

Switch Angle "Teach" "Start" Angle "Teach" "Start"

15° 210 ms 150 ms ±15° 320 ms 260 ms

15° 170 ms 120 ms ±15° 210 ms 190 ms

90° 580 ms 280 ms ±45° 720 ms 370 ms

90° 330 ms 250 ms ±45° 360 ms 300 ms

180° 1000 ms 390 ms ±90° 1200 ms 470 ms

180° 520 ms 370 ms ±90° 550 ms 410 ms

270° 1440 ms 510 ms ±180° 2400 ms 720 ms

270° 700 ms 470 ms ±180° 1100 ms 630 ms

Note:

"Cycle" time means: wand returned to stop position.

"Measuring time" for "K.O." in a "Start" cycle ≈ ½ cycle time when using scanner BK7SC, i.e. for scanning in one direction.

Times hold for setting "Tolerance" switch to "small", switch set to "great" will slightly increase "Start" cycle times!


Rev. 2.00 dated 20.01.2006 Page 35

8 Status Indication

8.1 Yellow LED

Fast flashing = Self-test

After power-up, the system will carry out a self-test indicated by fast flashing of this yellow LED.

Steady illumination = Ready to operate

Following its self-test, the system is ready to operate. The LED stops flashing and remains steady.

Slow flashing = Scanner fault

The system has detected a scanner fault:

• Scanner is missing or has motor fault.

• Control cable is not correctly connected, e.g. even cable break.

Outputs will be switched inactive, the unit will remain in its present state, indicated by slow flashing of this yellow LED.

8.2 Red LED / Green LED

Steady illumination = Indication following scanning cycle

The red LED indicates a fault message.

The green LED indicates a no fault message.

Flashing = Illegal settings

A flashing red and green LED simultaneously indicates that one or more of the switches is incorrectly set, and/or the S1/S2 selection inputs have been connected incorrectly.


Page 36 Rev. 2.00 dated 20.01.2006

8.3 Error messages – Flashing red and green LED

Check the following settings to remove the error messages.

• "Scanner" toggle switch (BK7SC/BK7RLSC)

• "Object monitoring / Free space monitoring" toggle switch (O/F)

• Rotary switches P1 and P2

• Selection inputs S1 and S2

The error messages are distinguished by connected scanner with corresponding setting of toggle switch to "BK7SC" or "BK7RLSC".

Scanner BK7SC, "Scanner" switch set to BK7SC

Teach mode [requires: P1=0, P2=0] Error Correction

no free space monitoring, only object monitoring F O

Switch mode [requires: 0 ≤ P1 < P2 ≤ 270] Error Correction

Signal to "Teach" without effect, only "Start" pulse !

for object monitoring or free space monitoring P1 ≥ P2 P1 < P2

P2 > 270 P2 ≤ 270

Scanner BK7RLSC, "Scanner" switch set to BK7RLSC

Teach mode [requires: P1=0, P2=0] Error Correction

no free space monitoring, only object monitoring * O

Determination of stop position only with "Teach-in" S1/S2=01 00 or 11

in both directions: Selection inputs S1/S2 = 00 or 11 S1/S2=10 00 or 11 Having determined the stop position "Teach-in" in one direction is also possible besides scanning in one direction. Note: Stop position will not change!

Switch mode [requires.: P1 > 0, P2 > 0] Error Correction

Signal to "Teach" without effect, only "Start" pulse !

no free space monitoring, only object monitoring * O

for object monitoring P1=0, P2 > 0 P1 > 0

P2=0, P1 > 0 P2 > 0

Determination of stop position only with reference procedure S1/S2=01 00 oder 11

in both directions: Selection inputs S1/S2 = 00 or 11

Having determined the stop position scanning in one direction is also possible.

S1/S2=10 00 oder 11

* Special function of the relays


Rev. 2.00 dated 20.01.2006 Page 37

8.4 Installation Notes

8.5 Control voltage connection

Fig. 8-1: Control voltage connection

S1 S2 S324 V DC+ – Com Start TeachS1 S2 S3

24 V DC+ – Com Start Teach

BK MIKRO 7230 VAC (120 VAC)external control voltage

Start

ext.GND

ext.24 VDC

Control voltage

Teach-in

BK MIKRO 7230 VAC (120 VAC)internal control voltage

Start Teach-in

BK MIKRO 724 VDCseparate control voltage

Start

GND 24 VDCControl voltage

Teach-in

Power supplyGND24 VDC

BK MIKRO 724 VDCcommon power and control voltage supply

Start

GND 24 VDC

Power supplyand

Control voltage

Teach-in

Power supply

C NO/NCk.o.AC IN

L1 N C NO/NCo.k.

Power supply

C NO/NCk.o.AC IN

L1 N C NO/NCo.k.

S1 S2 S324 V DC+ – Com Start TeachS1 S2 S3

24 V DC+ – Com Start Teach

C NO/NCk.o.AC IN

L1 N C NO/NCo.k.

C NO/NCk.o.AC IN

L1 N C NO/NCo.k.


Page 38 Rev. 2.00 dated 20.01.2006

8.6 Mounting bracket

Techna-Tool Inc. offers a mounting bracket for the scanner as an accessory.

BK7-8MB (Article no. 61 07 165) contains the following parts:

Designation Material Part no.

Mounting bracket AlCuMgPb, F 38, thickness 8, naturally anodized 1, 2

2 cheese head screws with hexagonal hole M3x40

8.8 zinced 3

2 self-securing nuts M3 8 zinced 4

General tolerances ISO 2768 – mK burred edges

Fig. 8-2: Mounting bracket

8.7 Interference prevention

All inputs are opto-decoupled and thus maximally protected against interference voltage peaks, as caused, for example, by inductive sources.

Relay outputs are protected by varistors against inductive interference voltage peaks. Depending on the type of load used, further interference suppression measures may be necessary.

To ensure optimum operational safety, suppression measures, if required, must be taken at source, i.e. directly where interfe rence is caused.

Possible additional noise filters:

• RC combination (included in the contactor suppliers' product ranges)

• Varistors

• Diodes


Rev. 2.00 dated 20.01.2006 Page 39

9 Ordering Information

Control unit Article no.

BK7CTRL 120 VAC (also works w 24VDC) 63 04 222

BK7CTRL230 230 VAC 63 04 221

Scanner Article no.

BK7SC (scanner with mechanical backstop) 63 04 234

BK7RLSC (scanner without mechanical backstop) 63 04 235

Connection BK MIKRO 7 : Control unit – Scanner

Length Article no.

BK7C5 Control cable, straight connector* 5 m 62 04 248

BK7C10 Control cable, straight connector* 10 m N/A

BK7C15Control cable straight connector* 15 m 62 04 250

*Cables available with right angle connector

BK7EC5 Extension cable 5 m 62 04 210



BK7ECTCExtension cable incl. mounting socket 2 m 62 04 213

Accessories and spare parts Article no.

Scanning wands BK MIKRO 7:

– BKPIN345P Length 165 mm (standard) 10 pieces 62 04 022

– BKPIN250P Length 250 mm 10 pieces 62 04 216

– BKTSPIN6 HSS, length 165 mm 1 piece 62 04 215

– BKTSPIN250 HSS, length 250 mm 1 piece 62 04 231

BKPHSC7 Wand holder for short breakable chips incl. wand

1 piece 62 04 263

BKPH7 Wand holder incl. wand 1 piece 62 04 026

BK7-8MB Mounting bracket 61 07 165

Operating Instructions Issue Article no.

BK MIKRO 7 2.00 68 36 231

BA: LS-IC/BK MIKRO 7 Logbuch

Page 40 Rev. 2.00 dated 20.01.2006

BK MIKRO 7

Operating Instructions

Logbuch

Ausgabe Datum Datei-Name Charakteristik

1.00 10.02.00 BA_100_e_BK MIKRO 7.doc Basis: Version 1.00 deutsch

2.00 16.10.03 BA_200_e_BK MIKRO 7.doc Basis: Version 2.00 deutsch

Erstellt

am: 16.10.2003

von: Corina Bader

Geprüft

am: ........................

von: ......................................................

Freige geben

am: ........................

von: ......................................................

bk mikro model 7 & 7rl - techna-tool inc.oi: bk mikro 7 bk mikro 7 manual rev. 2.00 dated...

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